[Init] create project structure
1. server code is under /server/services
2. client code is under /static
3. client code contains two modules:
   A. cesium apis
   B. ui
[MOD] update Gruntfile.js

修改了cesium的concat任务,使得新建文件的时候，无需改动Gruntfile.js
[Feature] add search bar to main-ui
[Feature] add mini-map ui
[Feature] add tools and tools showing animation
[Bug] fix js/cesium/*.js grunt concat bug
[Feature] Bottom Images
[Feature] add click circle showing animation
[Bug] fix bottom alpha area's mask

底部工具条的左边遮挡住了球的操作
[Bug] the area of click-circle is too small
[Feature] add location shower
add measure.js convert.js getPosition.js